Larvae of the Lepidopteran " Parapoynx diminutalis " has also been a serious pest, and considerably inhibited the growth of " Nymphoides cristatum " during June July 1986.
12.
The shallow depressions filled with water accommodate plants such as " Blyxa, Nymphoides krishnakesara, Marsilea minuta, Cryptocoryne spiralis, Rotala malampuzhensis, Rotala malabarica " and " lsoetes coromandelina ".
13.
The genera " Menyanthes " and " Nephrophyllidium " grow only in the northern hemisphere, while " Liparophyllum " and " Villarsia " occur only in the southern hemisphere . " Nymphoides " species have a cosmopolitan distribution.
14.
Outside their native range, however, they can escape cultivation and become nuisance noxious weeds . " Nymphoides peltata " has become an increasing problem in Michigan, where it has been declared one of the " Most Wanted Aquatic Michigan DNR . It has become a problem as an invasive species due to how easily its seeds spread through water flow.
15.
Great spearwort, " Ranunculus lingua ", a rarity in north-east England, is still found, but a number of other uncommon species have been lost in recent years, among them narrow-leaved water-parsnip, " Berula erecta ", water dropwort, " Oenanthe fistulosa ", and fringed water-lily, " Nymphoides peltata ".
16.
"Nymphoides krishnakesara " is a small water lilly appear during the wet phase in the small pools and ponds on the plateau . " Rotala malabarica " is a semi-aquatic plant seen largely in the temporary pools . " Justicia ekakusuma " ( Pradeep et al ., 1991 ), aptly named because of its nature of flower, is rare and seen in the rocky edges of the plateau . " Lepidagathis keralensis " ( Madhusoodanan and Singh, 1992 ) described for the first time from this locality and flowers during the dry phase.
